design and CSS

I am building a web application for project management ([login to view URL]) - where you can start your own workspace (company), create projects and tasks, assign to users, set meetings, billable rates and so on. I am looking for someone to design and CSS the GUI for the site. It has to be unique, special and powerful - yet simple and usable. The best design in that field is [login to view URL] - very simple and straightforward. Has to design a logo, user's dashboard, all the screens inside and put all in high level CSS